Vent for receptacles.



No. 823,851.. PATENTED JUNE 19, 1906.

P. DONALDSON.

VENT FOR REGEPTACLBS.

APPLICATION FILED MAY27. 1904. RENEWED snrcryle, 1905.

Z 317 Lily rt QQJQZ nying drawings, which, with the letters of PERCY DONALDSON, OF BALTIMORE, MARYLAND VENT Fon REOEPTACLES.

Specification of Letters Patent.

Patented June 19, 1906.

Application filed May 2'7, 1904. Renewed September 16, 1905- Serial No. 278,783-

To all whom it may concern:

Be it known that I, PERcY DONALDSON, a citizen of the United States, residing, at Baltimore, State of Maryland, have invented certain new and useful Improvements in Vents for Receptacles; and I do declare the follow ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawin s, and to the letters of reference marked t ereon, which form a part of this s ecification.

- This invention re ates to new and useful improvements in vents for receptacles containing volatile liquids; and the object of the invention is to produce a simple and efficient means whereby a receptacle may be vented while liquid is being drawn therefrom and the ingress of air automatically cut off at the moment the drawing ofthe liquid is stop ed, thereby preventing the volatilization of? the liquid not under pressure excepting when the same are upon tap.

The invention consists, further, in various details of construction and combinations and arrangements of parts of the apparatus, which will be hereinafter fully described and then specifically defined in the appended claims.

I illustrate my invention in the accompareference marked thereon, form a part of this application, and in which drawings- Figure 1 is an elevation showing one of my improved devices attached thereto. Fig. 2 is an enlarged detail in perspective of the automatic vent.

Reference now being had to the details of the drawings by letter, A designates a receptacle, which may be of any sha e or size and I provided with an aperture a apted to receive a tubular casing D which may be of any size, preferably with open ends. N designates a rodmounted within said tubular casing, the lower end of which rod is secured to a valve 0, designed to seat against the lower end of said casin while the upper end of the rod is turned to form an eye N, which is pivotally mounted upon a pin E carried in the arms F, forming the bifurcated end of the lever K. The upper end of the. casing N is extended to form twocurved arms a, carrying a pin n, upon which the weighted lever K is pivotally mounted, the urposeof said lever being to normally hold tlie valve seated excepting when there is sufficient pressure upon the upper surface of the valve to overcome the weighted end of said lever, which will allow air to enter the receptacle equipped with the apparatus only while liquid is bein dispensed. By this provision it will be note that the evaporation of any volatile liquid is prevented only at the moment of the dis pensing of the liquid.

It will be understood that in the application of my vent for receptacles the same is designed for use only upon rece tacles in. which volatile li uids of any kin are contained and whic are not under pressure, thereby allowing the valve to be actuated by the relative ressures upon the opposite faces of the va ve and to be actuated only as the liquid is being'dispensed.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An automatic vent for receptacles adapted to contain volatile liquids under normal pressure, comprising an open-ended tube adapted for attachment to a receptacle, a weighted lever pivoted to said tube, a rod pivotally connected to said lever, and a valve carried by said rod and adapted to be held by said lever against the bottom of the tube, as set forth.

2. An automatic vent for receptacles adapted to contain volatile liquids under normal pressure, comprising an open-ended tube adapted for attachment to a receptacle, one end of said tube being bifurcated and having curved arms, a weighted lever pivotally connected to said arms, a rod pivotally connected to said lever and passing through said tube, and a valve at the end of said rod adapted to be normally held by said lever against PERCY DONALDSON.

Witnesses:

I ENOCH HARLAN, HARRY L. PRIcE 

